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新疆哈密黄山地区铜镍硫化物矿床的稀土元素特征及意义
引用本文:王玉往,王京彬,王莉娟,方同辉.新疆哈密黄山地区铜镍硫化物矿床的稀土元素特征及意义[J].岩石学报,2004,20(4):935-948.
作者姓名:王玉往  王京彬  王莉娟  方同辉
作者单位:1. 北京矿产地质研究所,北京,100012;中国科学院矿产资源研究重点实验室,中国科学院地质与地球物理所,北京,100029
2. 北京矿产地质研究所,北京,100012
基金项目:本文由国家重点基础研究项目(编号:2001CB409806)资助
摘    要:通过对新疆哈密黄山铜镍矿带典型矿床矿石矿物和含矿岩石的稀土元素地球化学研究,发现产于造山带的铜镍硫化物矿床的容矿镁铁-超镁铁质岩具有富水特征,部分硫化物稀土曲线呈特殊的“三重弯曲”模式,反应出由于多种液相(流体和熔体)共存,硫化物熔体中含有大量热液流体,在主成矿期(岩浆熔离期)后逐渐演化出富含气液的成矿流体。本区矿床稀土特征不同于克拉通边缘的铜镍矿床,造成上述热液流体参与成矿的原因在于含矿岩体本身富水,可能与碰撞后富水洋壳的拆沉熔融有关。

关 键 词:铜镍硫化物矿床  稀土元素的“三重弯曲”模式  富水镁铁-超镁铁岩  新疆
文章编号:1000-0569/2004/020(04)-0935-48
修稿时间:7/7/2003 12:00:00 AM

REE characteristics of Cu-Ni sulfide deposits in the Hami area, Xinjiang
WANG YuWang,WANG JingBin,WANG Lijuan and FANG TongHuiBeijing Institute of Geology for Mineral Resources,Beijing,ChinaKey Laboratory of Mineral Resources Research.REE characteristics of Cu-Ni sulfide deposits in the Hami area, Xinjiang[J].Acta Petrologica Sinica,2004,20(4):935-948.
Authors:WANG YuWang  WANG JingBin  WANG Lijuan and FANG TongHuiBeijing Institute of Geology for Mineral Resources  Beijing  ChinaKey Laboratory of Mineral Resources Research
Institution:WANG YuWang,WANG JingBin,WANG Lijuan and FANG TongHuiBeijing Institute of Geology for Mineral Resources,Beijing,ChinaKey Laboratory of Mineral Resources Research,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China
Abstract:On the base of study on the REE geochemistry of ore minerals and host rocks of typical deposits from Huangshan Cu-Ni metallogenic belt, Xinjiang, it was discovered that the host mafic-ultramafic rocks of the Cu-Ni sulfide deposits occurred in orogen are characterized by water-richment. Some REE pattern of sulfides shows particular " triplex curve" model, which suggests that due to coexistence of multiple liquid phase ( fluid and melt) , the sulfide melt possibly contained a lot of hydrothermal fluid and increasingly derived to gas and liquid-rich ore-forming fluid after the master metallogenic epoch (magmatic segregation stage). REE characteristics of the deposits in this area are quite different from thos of the Cu-Ni deposit occurred in cratonic margin, and the reason of hydrothermal fluid joining in mineralization might be owing to water-rich of ore-bearing rockbody that related to delamination and melting of water-rich oceanic crust in post-collision stage.
Keywords:Cu-Ni sulfide deposit  "Triplex curve" model of rare earth elements  Water-rich mafic-ultramafic rock  Xinjiang
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